读“中国政区略图”,回答:
(1)根据图中数码号的位置,填写相应的地理名称:
①____________市;②_____________省;
                        省;④_____________自治区;
⑤____________岛;⑥_____________海;
(2)北回归线穿过我国的省区有____________、______________、______________、_____________。
(3)指出我国的四至:
最北:______________________________________________;
最南:                                                                                            
最东:______________________________________________;
最西:                                                                                            。 
(4)从纬度位置说明我国地理位置的优越性。
                                                                                                                 _                                             

(5)从海陆位置说明我国地理位置的优越性。
                                                              _____                                                                                       

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